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				<P><STRONG>&nbsp;Import data file format.</STRONG></P>
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		<P>Database data to import are text files *.xyz (extension *.xyz is not necessary). 
			The format of the file follows:</P>
		<P>Keywods:<BR>
			&nbsp;&nbsp;&nbsp; <FONT color="#990000">// </FONT><FONT color="#000000">- </FONT>
			<FONT color="#000000">tag denotes comment, once this tag appears on a&nbsp;line, 
				the line is ignored<BR>
				&nbsp;&nbsp;&nbsp; </FONT><FONT color="#990000"><EM>profile [number]</EM></FONT><FONT color="#000000">
				- starts the profile data&nbsp;section. from the&nbsp;next line in file data 
				reading starts. <FONT color="#990000"><EM>[number]</EM></FONT></FONT><FONT color="#000000">
				is your profile number.</FONT></FONT></P>
		<P>Fist data column are fiduacials. This column is inevitable. One more field 
			data&nbsp;column is inevitable. Next columns are optional. After the data 
			section can follow next profile.</P>
		<P>Follows an example of file.</P>
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		<P>*******************************<BR>
			// deriv dx dz
			<BR>
			profile 1
			<BR>
			0.0 -72.6&nbsp;&nbsp;&nbsp; -73.2369&nbsp; -97.4279
			<BR>
			0.2 -121.7&nbsp; -20.1339&nbsp; -63.9342
			<BR>
			0.4 -161.9&nbsp; -40.2916&nbsp; -81.1438
			<BR>
			0.6 -201.3&nbsp; -24.592&nbsp;&nbsp;&nbsp;&nbsp;-90.1137
			<BR>
			...<BR>
			...<BR>
			...<BR>
			profile 2&nbsp;&nbsp;
			<BR>
			0.0 -72.6&nbsp;&nbsp;&nbsp; -73.2369&nbsp; -97.4279
			<BR>
			0.2 -121.7&nbsp; -20.1339&nbsp; -63.9342
			<BR>
			0.4 -161.9&nbsp; -40.2916&nbsp; -81.1438
			<BR>
			0.6 -201.3&nbsp; -24.592&nbsp;&nbsp;&nbsp;&nbsp;-90.1137
			<BR>
			...<BR>
			*******************************<BR>
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